Metal bending or forming dies.



G. A. OHL, JR. METAL BENDING 0R FORMING DIES.

APPLIOATIONTILED MAR. 11, 1911.

1,003,197. Patented Sept. 12, 1911;

2 SHEETS-SHEET 1.

INVENTOR.

' sem 9E Mm J11,

ATTORNEYS Patented Sept. 12,1911.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE A. OHL, JR., OF NEWARK, NEW JERSEY, ASSIGNOR TO GEORGE A. OHL &(10., A

CORPORATION OF NEW JERSEY.

METAL BENDING on FORMING ms.

Specification of Letters Patent- Patented Sept. 12, 1911.

Application filed March 11, 1911. Serial No. 613,708.

To all whom "it may concern:

Be it known that I, GEORGE A. OHL, Jr., a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Metal Bending or FormingDies; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to characters of referencemarked thereon, which form a part of this specification.

The present invention has reference, generally, to improvements in diesfor forming sheet-metal; and, this invention relates, more particularly,to a novel arrangement andconstruction of dies adapted to be used inthat class of power presses which are employed for bending or formingsheet metal into desired conformations, such for exampl, as bending andforming thesheet-metal into the forms of ridge-rolls for roof-trees, andthe like.

The invention has for its principal object to provide a novelarrangement and construction of dies by means of which completeridge-rolls, and the like, can be formed 01 shaped in a singleoperation.

.Other objects of the present invent-ion not at this time moreparticularly enumerated will be clearly understood from the followingdetailed description of the present invention.

lVith the objects of the present invention in view, the said inventionconsists, primarily, in the novel construction of dies hereinafter setforth; and, the invention consists, furthermore, in the novelarrangements and combinations of the various parts of the dies, as wellas in the details of the construc tion thereof, all of which will behereinafter more fully described, and then finally embodied in theclauses of the claim which are appended to and which form an essentialpart of this specification.

The invention is clearly illustrated in the accompanying drawings, inwhich I Figure 1 is a side elevation of the novel construction of diesin their opened positions ready to be operated. Fig. 2 is another sideelevation of said dies after the same have been operated to form thesheet-metal into the desired shape. Fig. 3 is a transverse verticalsection, taken on'line 33 in said Fig. 1, and Fig. 4 is a similarsection, taken on line/14c in said Fig. 2, both of said views being madeon a considerably enlarged scale. Fig. 5 is a horizontal section, on asmaller scale,.said section being taken on line 55 in said Fig. 1,looking in a downward direction, and showing the female die-members,with the male die-members removed.

Similar characters of reference are, employed in all of the abovedescribed views, to indicate corresponding parts.

Referring now to the several figures of the drawings, thereference-character 1 indicates a male die-member, the same beingprovided at its free end with a roll-forming portion Q andflange-forming portions 3 extending upwardly from the said roll-formingportion 2. Said male die-member 1 is furtherprovided with the tail-pieceor stock 4, the same having an upwardly and longitudinally ex: tendingrib 5. Said tail-piece'or stock 4 and its rib 5 form the means by whichthe said male-die member 1 is secured to the hammer of a power press foroperating said dies.

The reference character 6 indicates the bed-plate of a femaledie-member,said bedplate 6 being provided with a pair of longitudinally extendinggrooves 7, formed in the upper surface of suitable fulcrum beds 8 lyingat each side of the said bed-plate 6.

Pivotally supported in the grooves 7 of said fulcrum-beds 8, by means ofthe fulcrum-ribs 9 formed on their outer sides, are a pair of female-diemembers 10. Said female die-members 10 are provided adjacent to theirlower marginal edges with longitudinally extending roll-forming surfaces11 which conform to the conformation of the said roll-forming portion 2of the male die-member 1, said female die-members 10 being furtherprovided with flange-forming portions '12, which conform to the saidflange-forming portions 3 of the said male die-member 1. The lowermarginal edges of said female die-members are provided with a pluralityof cam-members 13 and cut-away portions 14, the cam-members 13 of one ofsaid female die-members being adapted to dovetail into the cut-awayportions 14 of the opposite female die-member. The bed-plate 6 of thesaid female die-members is provided with suitably disposed receivingsockets 15 in which are seated suitable coiled springs 16, the latterbeing adapt- .ed to exert the force of their compression upon the underside of'the cam-members,13 of said female die-members 10, so as to throwthe latter open and into their normal initial positions when theoperating pressure of said male die-member 1 is released from saidfemale-die-members. The bed-plate 6 is further longitu ma'lly extendingrib 17 adapted'to received in the corresponding groove in the bed of apowerpress with which said dies are used.

The operation ofsaid novel construction of forming dies is as follows: Asheet of metal, as 18, of proper width, is placed above the openedfemale die-members 10, so as to lie across the respective roll-formingsurfaces 11 and the flange-forming portions 12, in the manner shown moreparticularly in Fig. 3 of the drawings. When in this position, which isthe normal or opened position of the female die-members 10, thecam-members 13 are raised from said bedplate 6 and project upwardly inthe path of the descending male-die-member 1. After the sheet of metal18 has been placed in the manner hereinabove set forth, the malediemember 1 is allowed to descend, so that its roll-forming portion 2 isbrought in contact with said sheet-metal'18, thii's'subsequently causingthe latter to be forcibly pressed upon the upwardly projectingcammembers 13 of the female die-members 10. The pressure of thedescending male diemember 1 upon said cam-members 13, causes the saidfemale die-members 10 to be rocked orv moved upon their respectivefulcrumribs 9 which, as has been stated, are seated in said grooves 7 ofsaid fulcrum-beds 8 of the bed-plate 6. This rocking movement tends toclose or force the female die-members 10 into contact with said malediemember 1, squeezing the sheet-metal 18 between the roll-formingportion 2 and the flange-forming portions 3 of said male diemember 1 andthe roll-forming surfaces 11 and the flange-forming portions 12 of therespective female die-members 10, in the manner clearly illustrated inFig. 4 of the accompanying drawings, and as will be clearly understoodfrom an inspection of said figure. The leverage exerted by the saidcam-members 13 upon their respective female die-members 10, causes thelatter to operate upon the sheet-metal with great pressure, so as toforce the same to conform to the shape of said male die-member 1, as

willbe clearly evident. After this operation has taken place, thepressure of the power press is released and its hammer raised, so as toremove the male die-member from its forming contact with the said femaledie-members. .As soon as the pressure of the male die-member is releasedfrom said cam-members 13, the said springs lfi,

rovided upon its under side with a which are at that time undercompression, exert their pressure against the under side of saidcam-members 13, whereby the same are pressed upwardly, such movementtending to'rock the said female die-members 10 in the oppositedirections, so as to thereby remove the same from the path of theascending male die-member and again opening the same to their normalinitial positions. The ascending male die-member 1 carries with it thesheet metal, bent to correspond to the conformation of said diemember,and to form the desired ridge-roll, or the like. After the severaldie-members have resumed their normal initial positions, the saidsheet-metal which has been bent to form the desired ridge-roll may bewithdrawn from said male die-member sliding the same lengthwise of themale diememher 1, until the finished metal product is removed therefrom.

I am aware that some changes may be made in the arrangements andcombinations of the variousdevices and parts, as well as in the detailsof the construction of the same, without departing from the scope of thepresent invention as described in the foregoing specification, and asdefined in the claims which are appended hereto. Hence, I do not limitmy invention to the exact arrangements and combinations of the devicesand parts as set forth in the said specification, nor do I confinemyself to the exact details of the construction of the said parts, asillustrated in the accompanying drawings.

I claim 1. In metal bending dies, the combination of a male die-memberof desirable conformation and a female-die comprising a bedplate,fulcrum-beds ateach side of said bedplate provided with grooves in theupper surface thereof, a pair of female die-members, fulcrum-ribsconnected witheach female die-member and operatively seated,respectively, in the grooves of said fulcrumbeds,.each female die-memberbeing provided with die-faces or surfaces corresponding to theconformation of said male-die member, and cam-members projecting fromthe lower marginal portion of each female die-member and adapted to beoperated by the pressure of the descending male diemember so as tooscillate said female diemembers upon their fulcrum-ribs and cause thesame to coiiperate with said male diemember to bend sheet-metal, thelower marginal edges of each female die-member being'provided withcut-out portions adapted to' receive the said cam-members of therespectively opposite female die-member, substantially as and for thepurposes set forth.

2. In metal bending dies, the combination of a male die-member ofdesirable conformation and a female die comprising a bedplate,fulcrum-beds at' each side of said bedplate provided with grooves in theupper surface thereof, a pair of female die-mem bers, fulcrum-ribsconnected with each female die-member and operatively seated,respectively, in the grooves of said fulcrumbeds, each female die-memberbeing provided with die-faces or surfaces corresponding to theconformation of said male-die member, cam-members projectin from thelower marginal portion of each gemalediemember and adapted to beoperated by the pressure of the descending male die-member so as tooscillate said female die-members upon their fulcrum-ribs and cause thesame to cooperate with said male-die member to bend sheet-metal, thelower marginal edges of each female die-member being provided withcut-out portions adapted to receive the said cam-members of therespectively opposite female die-member, and means for returning saidfemale-die members to their normal initial position, substantially asand for the purposes set forth.

3. In metal bending dies, tliecombination of a male die-memberofdesirable conformation and a female die com rising a bedplate,fulcrum-beds at each si e of said bedplate provided with. grooves in theupper "and cause the same to cooperate with said male-die member to bendsheet-metal, and means for returning said female die members to theirnormal initialposition, comprising the provision in said bed-plate ofreceivmg sockets, and a coiled spring arranged in each receiving socket,said springs engaging the under sides of said cam-members, substantiallyas and for the purposes set forth.

In testimony, that I claim the invention I set forth above I havehereunto set my hand this 9th day of March, 1911. v

GEORGE A. OHL, J R. Witnesses:

FREDK. C. FRAENTZEL, -FREDK. H. W. FRAENTZEL.

